双辊薄带连铸熔池液面波动物理模拟

设计了一个双辊薄带连铸物理模拟试验装置,利用浪高仪对双辊熔池液面波动进行了实验测定.研究了不同水口结构、熔池高度等参数对熔池液面波动的影响,为优选出满足双辊薄带连铸布流要求的水口结构尺寸提供依据.     

一种自由界面追踪的模板化VOF方法

发展了一种模板化的volume-of-fluid (VOF)方法．该方法根据自由界面的法向建立一个模板,然后由已知的网格单元上的流体体积比值确定出自由界面的准确位置,使得在二维情形下一个网格单元被自由界面切割的形式只有3种．另一方面,引入了单元边流体占有长度的概念,在此基础上建立了一个统一的流体占有面积模型,可以使得自由界面输运方程的求解有统一的算法．该方法不受网格单元形式的限制,并且容易推广到三维情形．算例表明,该方法能保证自由界面的跟踪精度．     

A stencil-like volume of fluid （VOF） method for tracking free interface

A stencil-like volume of fluid （VOF） method is proposed for tracking free interface. A stencil on a grid cell is worked out according to the normal direction of the interface, in which only three interface positions are possible in 2D cases, and the interface can be reconstructed by only requiring the known local volume fraction information. On the other hand, the fluid-occupying-length is defined on each side of the stencil, through which a unified fluid-occupying volume model and a unified algorithm can be obtained to solve the interface advection equation. The method is suitable for the arbitrary geometry of the grid cell, and is extendible to 3D cases. Typical numerical examples show that the current method can give ＂sharp＂ results for tracking free interface.